<template>
      <el-container class="home-container">
        <!--头部区域 -->
        <el-header>
          <div>
            <img src='../assets/css/20190220205755-a230cb9b.jpg' alt=''>
            <span>电商后台管理系统</span>
          </div>
          <el-button type='info' @click='logOut'>退出</el-button>
        </el-header>
        <!--页面主体区域 -->
        <el-container>
          <!--侧边栏 -->
          <el-aside :width="isCollapse ? '64px' : '200px'">
            <div class="toggle-button" @click="toggleCollage">|||</div>
            <!--侧边栏菜单区域 -->
            <el-menu
              :default-active="activePath"
              background-color="#333744"
              text-color="#fff"
              active-text-color="#409eff"
              unique-opened
              :collapse="isCollapse"
              :collapse-transition="false"
              :router="true">
              <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
                <!--一级菜单 -->
                <template slot="title">
                  <i :class="iconsObj[item.id]"></i>
                  <span>{{item.authName}}</span>
                </template>
                  <!--二级菜单 -->
                <el-menu-item :index="'/'+subitem.path" v-for="subitem in item.children"
                              :key="subitem.id" @click="saveNavState('/'+subitem.path)">
                  <i class="el-icon-menu"></i>
                  <span>{{subitem.authName}}</span>
                </el-menu-item>
              </el-submenu>
            </el-menu>
          </el-aside>
          <el-main>
            <router-view></router-view>
          </el-main>
        </el-container>
      </el-container>
</template>

<script>
export default {
  name: 'Home',
  data () {
    return {
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    async getMenuList () {
      const { data: res } = await this.$http.get('/menus')
      if (res.meta.status !== 200) {
        return this.$message.error('获取列表失败！')
      }
      console.log(res)
      this.menuList = res.data
    },
    logOut () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    toggleCollage () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }

}
</script>

<style lang = "less" scoped>
  .home-container{
    height: 100%;
  }
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #FFF;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
      span {
        margin-left: 15px;
      }
    }

  }
  .el-aside {
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
  }
  .el-main {
    background-color: #EAEDF1;
  }
  img{
    height: 55px;
    width: 50px;
    padding: 2px;
  }
  .iconfont{
    padding: 10px;
  }
  .toggle-button{
    font-size: 10px;
    background-color: #4a5064;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }

</style>
